"Temporary file write failure" is what is says - an inability to write. That suggests either permissions or space to me. I cannot see it as being permissions as the MySQL database rarely has permission problems once it is up and running. That suggests space to me.

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"Alter table" creates a copy of the table in the same folder as the original table. It means that for a certain period you will need as much free space as the original table. For nearly 300 million rows I am guessing you will need a few GB spare (35GB or thereabouts).

Creating a new table with indexes may not solve the problem unless you delete records from one table when you have safely moved them to the other table. Look at the filesize for the current table and then compare that with the amount of free space available.

Introduction
In this installment of my SQL tidbits, I will be looking at parsing Extensible Markup Language (XML) directly passed as string parameters to MySQL 5.1.5 or higher. These would be instances where LOAD_FILE (http://dev.mysql.com/doc/refm…

Both Easy and Powerful
How easy is PHP? http://lmgtfy.com?q=how+easy+is+php (http://lmgtfy.com?q=how+easy+is+php) Very easy. It has been described as "a programming language even my grandmother can use."
How powerful is PHP? http://en.wikiped…

Access reports are powerful and flexible. Learn how to create a query and then a grouped report using the wizard. Modify the report design after the wizard is done to make it look better. There will be another video to explain how to put the final p…

You have products, that come in variants and want to set different prices for them? Watch this micro tutorial that describes how to configure prices for Magento super attributes.
Assigning simple products to configurable: We assigned simple products…